412 Class 10.—PHILOSOPHICAL, MUSTCAL, HOEOLOGICAL, [UsitE”
North, North Central, and South Central Galleries.
41 Walter, Francis, 9 Devonshire Place —Inventor.Agent—Mr. Hawley, 123 Regent Street.
Model of a new design for giving a moral and religiousapplication to the dial indications of a clock. The sub-ject has been the study of five years.
43 Thorneloe, C., Lichfield — Designer andManufacturer.
Clock, which strikes quarters, and goes 32 days.Design, Lichfield cathedral .
Gothic skeleton clock.
46 Grant, P., 29 Lower William Street , St. John's Wood—Designer.
Timepiece-stand, composed of ivory, tulip-wood, andebony.
46a Copland, C., M.A., South Villa , Remington Oval—Proprietor.
A watch once the property of Henry VIII .
Silver watch, of same character and date, finely en-graved.
Gilt watch, 150 years old, chased, Henri Quatre style.
47 Harvey, W., Stirling , Scotland — Inventor andManufacturer.
Improvement in horology, dispensing with strikingwork. Only one wheel is used, which is placed underthe hour-wheel, and receives motion from it. This im-provement can be applied to almost any other timepieces,especially to skeleton timepieces. The article exhibitedis the original invention.
49 Bennett, George Weedon , Blackheath , Kent —Manufacturer.
A public clock, showing time on four dials, andintended to be fixed in an ornamental case at the inter-sections of streets, or the approaches to bridges, entrancesto parks, village greens, the quadrangles of baronial halls,in colleges or other public places, in order to supply cor-rect time, independently of church clocks (which are,from their lofty and exposed position, almost alwayswrong), and to serve as useful ornaments in the streets.It has a two-seconds’ pendulum, pin-wheel escapement,lantern pinions, gun-metal wheels, and slate dials; andthe whole is constructed with every regard to accuracy ofperformance. Two designs for cases accompany it; butthese would necessarily be adapted to the locality andtaste of the purchaser.
52 Donegan, John, Upper Ormond Quay, Dublin —Manufacturer.
Gold and silver watches, of Dublin manufacture.Specimens of Irish gold and silver, from Ballycorusworks.
52a Aubert & Klaftknberger, 157 Regent Street —Manufacturers.
Regulator remontoir, and of continual power. Themovement consists of two barrels, centre, third, fourth,and escapement wheels: the axis of the fourth wheeltraverses the upper plate, and receives a wheel which isfixed on the axis of the pinion above, the object of whichis to wind up the weight of the maintaining power; tinsmovement maintains the oscillation of the half-secondpendulum.
The escapement wheel, and the second wheel exposedin the dial, form part of the independent train, which hasto maintain the oscillation of the mercurial pendulum.
The principal and medial trains are brought into com-munication by means of the third wheel, seen in the dial:this wheel is fixed in the centre of a rack mounted on anaxle, which is pivoted between the frame; a wheel here
forms a depth into the rack, and upon the axle on vhi<jthis wheel is placed, is fixed a double pulley, on one siof which is suspended a small weight, and on the oththe half-second pendulum. The weight and pendulnidraw contrary ways, and as the weight is heavier, it g lVthe power to the independent train. .
The third wheel of the principal train, which forms tn^depth with the medial wheel seen in the dial, will displace it from right to left; by which means, if the twwheels, having the same number of teeth, turn equal 'quick, the intermedial wheel will be set in motion* &its axle will not change in position, and consequently track, and also the wheel in which the rack works, will ■>immoveable, and the hand fixed to the axle of the pull e Jwill point to zero. .
The independent train receiving thus a force constan >and maintaining the oscillation of the mercurialdulum, will not be susceptible of variation. Any dmeence of quickness in the action o^ the second wheel up‘>the medial wheel in the dial, can only be occasioned Jthe principal train, through the action of the half-seco* 1pendulum, which, if not perfectly regulated, will occasioan advance or retarde.
If the half-second pendulum should advance, the p rJl1 ^cipal train will raise the weight of the force constante, authe half-second pendulum, acting in a contrary sense, ^cause it again to fall, and consequently the penduluwill then retarde. If, on the contrary, the half-seconpendulum loses, the principal train will not raiseweight of the force constante sufficiently quick, and_tpendulum will then drop; but the regulator acting 111contrary manner will again shorten it, which will thcause it to advance.
Two-day marine chronometer.
Repeating watch, in gold case, striking the hou jquarters, and half-quarters; with lever escapement ancompensation balance, showing, on the dial plate, the agof the moon, the day of the month, the hours, minute >and seconds.
Pocket chronometer, in gold case, with enamel dial*
Duplex and lever watches in gold cases.
53 Pennington, John, High Street , Camberwell ■—Inventor and Manufacturer. .
Marine chronometer, with improved compensatingbalance weight, to remedy the defect produced in ordin jchronometers by extremes of temperature. .
A A represents levers with weights attached, B Bon pivots, C C, held against bankings, D D, in nut* ^temperature when not in action, by springs, E E, n 10towards centre of balance in extreme heat byscrews, F F, and the same by shoulder of screws, Gextreme cold.
Pennington’s Compensating Balance.